Improvement in flasks for casting iron columns



kwere imperfections.

lJNrrn` Shares PATENT Ormea.

HENRY DEMMIOK, OF N EV YORK, N. Y., ASSIGNOR TO HIMSELF AND PETER H.JACKSON, OF SAME PLACE.

IMPROVEMENT vIN FLASKS FOR CASTING IRON COLUMNS.

Specification forming part of Letters Patent No. 29,745, (lated August2l, 1860.

To @ZZ whom, it may concern Beit known that I, HENRY `DEMMICK, of thecity and State of New York, have invented and made a certain new anduseful Improvement in Flasks for Molding Columns and Similar Articles;and I do hereby declare that the following` is a full, clear, and exactdescription ofthe construction and operation of the same, referencebeing had to the annexed drawings, making part of this specification,wherein- Figure l is a plan of my said flask. Fig. 2 is a side elevationof the same. Fig. 8 is a cross-secti0n thereof, and Fig. 4 is across-section showing one of the sides laid over ready for dressing.

Similar marks of reference denote the same parts.

In molding columns it has been usual heretofore to .pack the sand aroundthe pattern, and then take out the same, dress the surface of the mold,and then lay in the core.

In the dressing of The sides of the mold as they stood in a verticalposition, particularly with square or box columns, great inconvenienceis experienced on account of the small amount of room and the unhandyposition; hence the sides of the mold have been fitted to lift off witha crane, in order to expose the face to inspection and dressing wherethere This was always done at the risk of the whole sand face fallingoff by any jar, and also at the risk of not returning it exactly to theformer position. Besides this, great difficulty was experiencedinintroducing the core, particularly with box-columnsiinished or paneledon all four sides, and

said core had to be parallel, or nearly so, orl

it could not be lowered into place between the two standing sides.

The nature of my said invention consists of cheek-pieces hinged onto thebottom part or the nowel,whereby the sides can be turned down whenmolded, the surface inspected and dressed, the core put in place afterone side is turned up, and then the other side is turned up, and theeope7 is laid in place, andthe casting made in said iiask. l

In the drawings, a is the nowel formed of the desired size and shape. bb are the cheekpieces, hinged to a at c c, and cl is the cope. Theseparts are to be provided with the necessary ring-bolts or eyes e e, bywhich they may be hoisted or lowered, and the nowel and cope have ltheusual cross-bars to sustain the sand. y The cheeks b b are to be formedof two pieces, as shown, so that by the removal of one therlask could beused for avery small column; but by the separation of these pieces abar, 0, as seen in the section, Fig. 6, of greater or less width, can beintroduced, and the whole secured by the clamps and screws ff.

g is a sand-cleat introduced on theinner face of the cheeks b b, nearthe bottom edge thereof. Said cleats g g are attached by bolts, so thatI can raise them up, in order to mold columns of less size by bringingthe pattern 7c above the cope a, thereby extending the capacity of mymold and avoiding the necessity of having a separate flask for eachcolumn; and-h h are flanges, made with ribbed edges and dovetail bases,setting between ribs cast on the inside of the cheeks b b. (See plan,Fig. 5.) By this mode of connection these sand-lianges can be removedand others substituted, either longer or shorteuwider ornarrower,according to the size of column, so as to come sufficientlynear the pattern; and in cases where projecting ornaments occur thesemetallic sand-cleats may be removed entirely, or shorter onessubstituted.

t z' are holes in the flanges of the cheeks, nowel, and cope, by whichthey are attached firmly by keybolts to resist the force of the meltedmetal when poured.

The operation is as follows: rIhe side k of the pattern is molded in thenowel in the usual way,and turned over onto the base Z. The sides orcheeks b b are then set up in place, the hinges cc being united. rIheside patterns, m m, are put in place with a center block to support thepatterns. Parting sand is spread between c and b, and the molding-sandfilled in and rammed as usual, the dowels being withdrawn, so that afterthe top pattern, u, has been molded the cope d may be lifted off withits pattern, then turned over, the pattern removed, the surfaceinspected and dressed. The sides or cheeks b b are then to be laid downhorizont-ally, as seen in Fig. 4, said cheeks turning on the hinges, andthe sand being supported by the cleats g. The respective patterns m mare to be removed, the surfaces of the mold inspected and dressed. Oneside is then turned up into place, the sand or other lcore introducedand properly positioned, rIhen the other cheek is turned up into itsformer position, the cope d is placed on the cheeks, the parts are keyedtogetheigand 'the whole is ready for casting. By this inode of openingthe ask I am enabled to introduce an irregular-shaped core,corresponding to the shape of the external surface, as seen by red linesin Fig. 3, thereby obtaining the same thickness of metal throughout thccasting, 'which is a great advantage, because, il the Styles are thickerthan the panels, the latter are often cracked bythe contraction of themetal. It the moldwere not fitted to open, as aforesaid, it will beapparent this core could not be introduced, ecause it is not parallel,butwider in someplaces than the main body ef the mold. From theforegoing description it will .be understood that there is no risk ofthe sides not coming to their exact place, no chance of jarring andinjury to the sand, and the workmen are greatly facilitated ininspecting the mold and dressing the saine; hence I am enabled'toproduce better castings with a less expenditure of labor than with anyIiask before invented with which I am acquainted.

I do not claim hinging the respective parts of molds to each other, asthat is well known; but

Vhat I claim, and desire to secure by Letters Patent, :is-

1. The ilasl; for casting columns, composed e f f, ittcd in the mannerspecified, so that the flask can be enlarged by separating saidcheekpieces and introducing a bar between said parts, as specified.

In witness whereof I have hereunto set my Signature this 15th day ofJune, 1860.'

HENRY DEMMIGK.

Nfitnesses:

LEMUEL W. SnnnnLL, THos. Guo. HAROLD.

